Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: quando a instituição em chapel hill, Carolina do Norte, se juntou à acc?
 ###Tabelas: CREATE TABLE season_5:_2001 (season_5:_2001_id AUTO_INCREMENT PRIMARY KEY, Episode # VARCHAR, Title VARCHAR, Directed by VARCHAR, Written by VARCHAR, Original airdate VARCHAR) CREATE TABLE artios_awards (artios_awards_id AUTO_INCREMENT PRIMARY KEY, Year INT, Category VARCHAR, Nominee(s) VARCHAR, Episode VARCHAR, Result VARCHAR) CREATE TABLE 2009_peaks (2009_peaks_id AUTO_INCREMENT PRIMARY KEY, Entry Date [A ] VARCHAR, Single VARCHAR, Artist VARCHAR, Peak INT, Peak Reached [A ] VARCHAR, Weeks in top 10 INT) CREATE TABLE member_schools (member_schools_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Nickname VARCHAR, Location VARCHAR, Founded INT, Joined ACC INT, School Type VARCHAR, ACC Football Titles INT) CREATE TABLE women's_doubles:_10_4_titles_6_runner-ups (women's_doubles:_10_4_titles_6_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents VARCHAR, Score VARCHAR)  
SELECT Joined ACC FROM member_schools WHERE Location = Chapel Hill, North Carolina